JPH10278605A - Axle housing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimize a gap between a spring bracket and a leaf spring by making the spring bracket mounting position of a trunnion type rear axle housing device adjustable in the lateral direction of a vehicle and improve operating stability when making a turn by minimizing motion of an unsprung member with respect to the leaf spring in the lateral direction of the vehicle. SOLUTION: A mounting part 21a is formed on a rear axle housing 21 and a slotted hole 22d longish in the lateral direction of a vehicle is formed on a spring bracket 22, while the spring bracket 22 is sandwiched between a wear sheet 25 and the rear axle housing 21 mounting part 21a and temporarily fitted to each other by inserting a bolt 26 through the slotted hole 22d and the spring bracket 22 is adjusted within the range of the slotted hole 22d at the final assemblying process by moving the spring bracket 22 in the lateral direction of the vehicle so that a gap S between a leaf spring 30 and the spring bracket 22 may become an optimum gap S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trunnion type axle housing for a vehicle, and more particularly, to a leaf spring fixed to a chassis by fixing a spring bracket with bolts so that the mounting position of the spring bracket can be adjusted. The present invention relates to an axle housing device capable of adjusting a gap with a side surface to an optimum gap so as to reduce a lateral movement of a chassis and an axle housing, which is an unsprung member, when the vehicle turns, thereby improving steering stability.

[0002]

2. Description of the Related Art In a trunnion type axle housing device, a spring is provided on a side of a leaf spring fixed to a chassis as a vehicle suspension in order to regulate a lateral movement amount of an unsprung member with respect to the chassis within a predetermined range. Brackets are provided.

A conventional axle housing device 1 is shown in FIG.
7A and 7B, the mounting bracket 3a extends to both sides, and the spring bracket 3 provided with the leaf spring pressing part 3b on the upper part is formed by welding to form a bead 4 and fixed to the axle housing 2.

A wear sheet 9 is fixed to the spring bracket 3 by bolts 5 and nuts 6, while a plurality of laminated leaf springs 10 are attached to a chassis 11 by U bolts 12.
And is fixed via a pad 14 by a nut 13 and
It is arranged in contact with the wear sheet 9.

[0005] The leaf spring 10 is only fixed on the chassis 11 and rides on the wear sheet 9, and is not fixed to the axle housing 2 which is an unsprung member.
When a lateral force greater than the frictional force acting between the leaf spring 10 and the wear sheet 9 is applied, the leaf spring 10 moves relatively, but the movement is caused by the leaf spring 10 being fixed to the side surface 3 c of the spring bracket 3. The movement of the leaf spring 10 is restricted by contacting the wear plate 7.

Here, since the leaf spring 10 and the spring bracket 3 are independently fixed to the chassis 11 and the axle housing 2, respectively, the gap s between the leaf spring 10 and the wear plate 7 can be adjusted. Rather, it is determined only by the manufacturing accuracy of each part.

If each part is manufactured so as to reduce the gap s, the spring bracket 3 may be displaced due to variations in precision of the parts.
And the leaf spring 10 may interfere with each other, making it impossible to assemble. Therefore, the dimensions of each part are determined so that a gap s of about 5 mm can be secured so as not to hinder assembly. It was difficult to make the gap s small.

If there is a gap s between the wear plate 7 and the leaf spring 10, a force larger than the frictional force between the leaf spring 10 and the wear sheet 9 acts on the chassis 11 as a sprung member when the vehicle turns. Then, the leaf spring 10 slides on the wear sheet 9 and moves in the lateral direction, and the leaf spring 10 may come into contact with the wear plate 7, and there is a possibility that steering stability may be impaired.

When the leaf spring 10 moves and comes into contact with the wear plate 7, considerable noise is generated, and an impact force acts in the lateral direction of the vehicle, which is not preferable.

If the mounting position of the spring bracket 3 to the axle housing 2 is changed in the direction of the leaf spring 10 in order to reduce the gap s and welded, the wear plate 7 and the leaf spring 10 may interfere with each other due to variations in precision of parts. This causes a drawback that assembly becomes impossible.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and has an object to form a mounting portion which protrudes on both sides of a rear axle housing. At the same time, the bolt hole of the spring bracket is formed as a long hole in the left-right direction of the vehicle, a bolt is inserted through the long hole, and the spring bracket is clamped between the mounting portion and the wear seat and fixed to the rear axle housing. By doing so, it is possible to adjust the mounting position of the spring bracket in the left-right direction of the vehicle, thereby adjusting the distance between the side surface of the leaf spring and the spring bracket to an optimum clearance to thereby adjust the movement of the unsprung member. It is to reduce the size to improve the steering stability.

[0012]

SUMMARY OF THE INVENTION In summary, the present invention (claim 1) relates to a vehicle trunnion type axle housing used with a leaf spring, wherein a rear axle housing having a mounting portion for fixing a wear sheet with bolts is provided. An elongated hole formed in the left-right direction of the vehicle, the bolt being inserted into the elongated hole, the mounting portion, and a spring bracket sandwiched by the wear sheet and fixed to the mounting portion; The gap between the spring bracket and the side surface of the leaf spring can be adjusted by moving the spring bracket in the lateral direction of the vehicle within the range.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. The axle housing device 20 according to the present invention includes a rear axle housing 21 and a spring bracket 22 in FIGS.

The rear axle housing 21 has wheels (not shown) rotatably mounted thereon for loading a chassis 23. In a trunnion type vehicle shown in FIG. 1, two rear axles are provided. The housing 21 is swingably supported by a torque rod 24 and the chassis 2
3 so as to be swingable in directions opposite to each other so as to absorb irregularities on the road surface during traveling.

The rear axle housing 21 is formed with mounting portions 21a projecting from both sides, and a wear sheet 25 is disposed on the mounting portions 21a so as to straddle the rear axle housing 21. It is clamped and fixed firmly by bolts 26 and nuts 29. On the other hand, the plurality of leaf springs 30
They are stacked and fixed to the chassis 23, fixed to the mounting base 31 by the U bolts 32 and the nuts 33 via the pads 44, and placed on the wear sheet 25.

The spring bracket 22 is for restricting the lateral movement of the leaf spring 30 constituting a part of the sprung member, and is made by casting a metal such as iron. Fixing portion 22a, which protrudes from
A trunk 22b erected from 2a and a head 22c projecting from the trunk 22b so as to be horizontally bent are formed respectively.

An elongated hole 22d is formed in the fixed portion 22a in the left-right direction of the vehicle, and a side surface 22e of the body portion 22b is formed.
, A wear plate 34 is fixed by welding. The wear plate 34 is a plate-like member made of high-carbon steel, and has been subjected to a quenching process to prevent abrasion when the wear plate 34 interferes with the leaf spring 30 and has a higher surface hardness.

The spring bracket 22 is sandwiched between the mounting portion 21a of the rear axle housing 21 and the wear sheet 25 with a small gap S between the spring bracket 22 and the wear plate 34. Are inserted and fixed by a nut 29.

The present invention is configured as described above,
Hereinafter, the operation will be described. In FIG. 5, a gap S of about 5 mm is provided between the leaf spring 30 and the wear plate 34.
Then, the spring bracket 22 is placed on the mounting portion 21a, and the wear sheet 25 is further placed on the fixing portion 22a of the spring bracket 22, and is temporarily fixed with the bolt 25 and the nut 29, and each part is assembled.

In the final step of assembly, the nut 29 is slightly loosened and the spring bracket 22 is moved in the direction of the arrow A or B so that the gap S between the leaf spring 30 and the wear plate 34 is about 5 mm. After adjusting the position so as to provide a gap S of about 1 mm, the nut 29 is tightened and fixed firmly.

As a result, it is possible to absorb variations in the manufacturing accuracy of each part, and in any vehicle, the gap S between the leaf spring 30 and the wear plate 34 can be managed as an extremely small gap S of about 1 mm. Even when the vehicle turns, for example, even if a force greater than the frictional force acting between the leaf spring 30 and the wear sheet 25 acts on the sprung member and moves, the amount of movement is limited to about 1 mm. Therefore, no loud noise is generated and steering stability is not impaired, and stable operation can always be performed.

Further, since the amount of movement of the sprung member is small, when the leaf spring 30 comes into contact with the wear plate 34, the force acting on the wear plate 34 also becomes small, and the wear plate 3
4 is prevented from being worn and can be used for a longer period of time.

Also, the gap S between the leaf spring 30 and the wear plate 34 can be easily managed to a much smaller gap S than before, without having to control the production accuracy of each part as precisely as before. The cost can be reduced, and the high-performance axle housing device 20 can be provided.

[0024]

According to the present invention, as described above, the rear axle housing is formed with the mounting portions projecting on both sides, and the bolt holes of the spring bracket are formed as long holes elongated in the left-right direction of the vehicle. Since the spring bracket is fixed to the rear axle housing by inserting the bolt into the hole and holding the spring bracket between the mounting portion and the wear sheet, there is an effect that the mounting position of the spring bracket can be adjusted in the left-right direction of the vehicle, and As a result, there is an effect that the distance between the side surface of the leaf spring and the spring bracket is adjusted to the optimum gap, the movement of the unsprung member is reduced, and the steering stability can be improved.

[Brief description of the drawings]

FIGS. 1 to 5 relate to an embodiment of the present invention, and FIG. 1 is a perspective view of a trunnion type suspension equipped with an axle housing device of the present invention.

FIG. 2 is an enlarged perspective view showing a part of a spring bracket and a heavy leaf spring attached to an axle housing.

FIG. 3 is a partial longitudinal sectional side view of the axle housing device.

FIG. 4 is a partial longitudinal sectional front view of the axle housing device.

FIG. 5 is a partial longitudinal sectional front view of the axle housing device showing a state in which a mounting position of a spring bracket is adjusted so that a gap between a leaf spring and a wear plate becomes an optimum gap.

6 and 7 relate to a conventional example, and FIG. 6 is a partial longitudinal sectional side view of an axle housing device.

FIG. 7 is a partial longitudinal sectional front view of the axle housing device.

[Explanation of symbols]

 Reference Signs List 20 axle housing device 21 rear axle housing 22 spring bracket 22d long hole 21a mounting part 26 bolt 25 wear sheet 30 leaf spring S gap

Claims (1)

[Claims] 1. A trunnion type axle housing device for a vehicle used together with a leaf spring, wherein a rear axle housing in which a mounting portion for fixing a wear seat by bolts is formed, and an elongated hole formed in a vehicle left-right direction. The mounting portion and a spring bracket fixed to the mounting portion by being inserted into the elongated hole by the mounting portion and the wear sheet, and moving the spring bracket in a vehicle left-right direction within the range of the elongated hole. An axle housing device characterized in that a gap with a side surface of a leaf spring is adjustable.